COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 27, Problem 55QAP
To determine
How many kilograms of U-235 where fission reaction are about 30% efficient to produce 1000 MW of power continuously for one year?
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A normal family living in a villa has an approximate energy consumption of 20 MWh per year. Now suppose that the family is supplied by energy from a fusion power plants that utilize the energy released from the nuclear reaction We also assume that the power plant has an efficiency of 25%. How many grams of deuterium are needed each year to produce more energy this family?
•3 @ A thermal neutron (with approximately zero kinetic energy) is
absorbed by a 23U nucleus. How much energy is transferred from
mass energy to the resulting oscillation of the nucleus? Here are some
atomic masses and the neutron mass.
237U 237.048 723 u
239U 239.054 287 u
238U 238.050 782 u
240U 240.056 585 u
1.008 664 u
•14 A 236U nucleus undergoes fission and breaks into two mid-
dle-mass fragments, 140Xe and 96Sr. (a) By what percentage does
the surface area of the fission products differ from that of the origi-
nal 236U nucleus? (b) By what percentage does the volume change?
(c) By what percentage does the electric potential energy change?
The electric potential energy of a uniformly charged sphere of ra-
dius r and charge Q is given by
3
514περ
Chapter 27 Solutions
COLLEGE PHYSICS
Ch. 27 - Prob. 1QAPCh. 27 - Prob. 2QAPCh. 27 - Prob. 3QAPCh. 27 - Prob. 4QAPCh. 27 - Prob. 5QAPCh. 27 - Prob. 6QAPCh. 27 - Prob. 7QAPCh. 27 - Prob. 8QAPCh. 27 - Prob. 9QAPCh. 27 - Prob. 10QAP
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- (a) Calculate the energy released in the neutroninduced fission reaction n+235U92Kr+142Ba+2n, given m(92Kr)=91.926269 and m(142Ba)=141.916361u. (b) Confirm that the total number at nucleons and total charge are conserved in this reaction.arrow_forwardA nuclear physicist finds 1.0of 236Uin a piece of uranium ore (T1/2=2.348107y) . (a) Use die decay law to determine how much 236Uwould had to have been on Earth when it formed 4.543109yago for 1.0gto be left today, (b) What is unreasonable about this result? (c) How is this unreasonable result resolved?arrow_forward(a) Calculate the energy released in the neutron- induced fission n+238U96Sr+140Xe+3n , given m(96Sr)=95.921750uand m(140Xe)=139.92164 . This result is about 6 MeV greater than the result for spontaneous fission. Why? Confirm that the total number of nucleons and total charge are conserved in this reaction.arrow_forward
- (a) How much energy would be released if the proton did decay 1uria the conjectured reaction (b) Given that the decays to two (s and that the will find an electron to annihilate, what total energy is ultimately produced in proton decay? (c) Why is this energy greater than the proton's total mass (converted to energy)?arrow_forwardAssume onefourth of the yield of a typical 320kT strategic bomb comes from fission reactions averaging 200 MeV and the remainder from fusion reactions averaging 20 MeV. (a) Calculate the number of fissions and the approximate mass of uranium and plutonium fissioned, taking the average atomic mass to be 238. (b) Find the number of fusions and calculate the approximate mass of fusion fuel, assuming an average total atomic mass of the two nuclei in each reaction to be 5. (c) Considering the masses found, does it seem reasonable that some missiles could carry 10 warheads? Discuss, noting that the nuclear fuel is only a part of the mass of a warhead.arrow_forward235 would 1. Suppose that the average power consumption per year in a typical house is 300 W. What initial mass of 92 have to undergo fission to supply the electrical needs of such a house for a year? (Assume 200 MeV is released per fission. The Avogadro number is 6.02 × 10²³) g ssf60 f60 ssf ssf60 09Jssarrow_forward
- •49 SSM Generally, more massive nuclides tend to be more un- stable to alpha decay. For example, the most stable isotope of ura- nium, 28U, has an alpha decay half-life of 4.5 x 10° y. The most stable isotope of plutonium is 24Pu with an 8.0 x 10' y half-life, and for curium we have 248Cm and 3.4 x 10 y. When half of an original sam- ple of 238U has decayed, what fraction of the original sample of (a) plu- tonium and (b) curium is left?arrow_forwarda) Calculate the energy in joules released by the fusion of a 1.75 -kg mixture of deuterium and tritium, which produces helium. There are equal numbers of deuterium and tritium nuclei in the mixture. b) If this process takes place continuously over a period of a year, what is the average power output in units of megawatts?arrow_forward10. A nuclear reactor is 35% efficient and has a power output of 350 MW. If we consider all the fission reactions to give out the same energy, 2.78 x 1011 J how many moles of uranium-235 is needed each second by the power station? AA 5.975 x 105 B 5.935 x 105 C 5.835 x 105 D 5.739 x 105arrow_forward
- •30 Verify that the fusion of 1.0 kg of deuterium by the reaction ?H + ?H - 'He + n could keep a 100 W lamp burning for 2.5 x 10' y. (Q = +3.27 MeV)arrow_forward•11 O Calculate the disintegration energy Q for the fission of 52Cr into two equal fragments. The masses you will need are 52Cr 51.940 51 u 26Mg 25.982 59 u.arrow_forwardPage No. Date Thys 101-02 If a Fourth particle of mass 2.00kis Placed at X= 9 Y= O.200m Find the X- and the C.g. Coordingtes oF SHOT ON MI9T Al TRIPLE CAMERAarrow_forward
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